Computer History

Generations of Computers


The first computer was introduced on February 15, 1946 and made in 1822 by Charles Babbage in Polymath.

The first generation

The first generation was vacuum tubes. The first computers used vacuum tubes for circuitry and magnetic drums for memory, and were often enormous, taking up entire rooms. Vacuum tubes were invented in 1940.

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First generation computer

The second generation

The second generation was Transistors. Transistors replaced vacuum tubes and ushered in the second generation of computers, transistors made computers smaller, faster, cheaper, more energy efficient and more reliable than their first-generation computers. The transistor was invented in 1956.

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Second generation of computers

The third generation

The third generation was Integrated Circuits. The development of the integrated circuit was the hallmark of the third generation of computers. Transistors were miniaturized and placed on silicone chips, called semiconductors, which increased the speed and efficiency of computers by a lot. The integrated circuit was invented in 1964.

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Third Generation of Computer(Integrated Circuit)

The forth generation

The forth generation was Microprocessors.

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Fourth Generation of Computer

The fifth generation

The fifth generation was Artificial Intelligence.

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The Fifth Generation of Computer(Artificial Intelligence)

Famous computer inventors

Alan Turing

This is Alan Turing, He is a logician, mathematician and a computer scientist. He was born in London in 1912. He cycled 100km to school everyday. He was involved in breaking German codes in WW2. He often ran 60km to London for meetings. His first computer was called the 'Turing Machine'
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Alan Turing - BBC Horizon Documentary
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Tim Berners-Lee

This is Tim Berners-Lee, He made the first communication between an HTTP (Hypertest Transfer Protocol) client and server through the internet in November 1989. He created the worldwide web (W3). He was born on 8th June 1955 in London. He studied physics at 'Oxford University'.
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Tim Berners-Lee: The next Web of open, linked data
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Devices in a computer/Devices that attach to computers

Raspberry pi

The Raspberry Pi is a low cost, credit-card sized computer that plugs into a computer monitor or TV, and uses a standard keyboard and mouse. It is a capable little device that enables people of all ages to explore computing, and to learn how to program in languages like Scratch and Python.
Ben Heck’s Raspberry Pi Media Center


A motherboard has a CPU,memory drive, Hard drive, optical drive, video card, sound card and other ports and expansion cards. Also known as mainboard, mobo, MB, system board, logic board.
Understanding a computer system/motherboard.